Composite roll for rolling metal.



D. H. LENTZ.

COMPOSITE ROLL FOR ROLLING METAL.

APPLICATION FILED DEG.20, 1909.

Patented Feb. 7, 1911.

UNITE STATES PAET OFFICE.

DAVID I-I. LENTZ, OF CHICAGO, ILLINOIS, ASSIGNOR TO SELLERS MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

COMPOSITE ROLL FOR ROLLING METAL.

To all whom it may concern:

Be it known that I, DAVID H. LEN'rz, a citizen ofthe United States, residing at Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements in Composite Rolls for Rolling Metal, of which the following is a specification.

My invention rel'atesto a composite roll for rolling metal in which the body or main portion. of the roll is made of relatively cheap iron or low carbon steel, but which is provided with a hard or high steel member which affords the rolling surface. A roll of this sort may be employed to perform various sorts of work, and is particularly suitable in the manufacture of railroad tie or wear plates.

The rolls employed in making tie or wear plates are subjected to very great strains, particularly because it is necessary to form such articles with upstanding projections or ribs, and, in order that the plates should best resist. the particular strains to which they are subject, they should be rolled so that theseribs or projections are at right angles to the grain of the plate, that is, to

the direction of'the rolling. If rolls made of soft iron are employed, the strains to which they are subjected very soon cause them to be worn, to the extent of making them useless, or impairing their proper operation. It is not practical on the other hand to make the rollsentirely of hard or high carbon steel, both because of the expense involved and also because of the difficulty of shaping theroll entirely out of this very hard metal. Furthermore, it is desirable that the part of the structure affording the rolling surface should be removable, because, if such is the case, the fashioning of the rolling surface to give it the desired contour and pattern is facili- Specification of Letters Patent.

Application filed December 20, 1909.

Patented Feb. '7, 1911.

Serial No. 533,984.

those shown in the above application, and its object is to overcome the difficulty which arises when it is attempted to secure the hard steel collar directly to the shaft of the roll. In such case it is, of course, necessary that the internal diameter of the collar should be precisely that of the shaft to which it is to be fitted. This involves a machining of one or both of the contacting surfaces. The difiicult-y is enhanced when, as is customary, the hard steel ring is tempered after the pattern is out upon the surface, because such tempering often results in some shrinkage or distortion of the collar, which, however slight it may be, affects the fit between the collar and the shaft of the roll.

My present invention contemplates initially making the-internal diameter of the collar greater than the diameter of the part of the roll upon which the collar is fitted, and interposing between the collar and the roll a wedge member which may be given any adjustment necessary to produce a close fit between the collar and the roll. It will be seen that this construction is considerably simpler in several respects than the constructions described in my application above referred to.

. The invention is illustrated in "a preferred embodiment in the accompanying drawings, wherein- Figure 1 is a side elevation of a pair of tie-plate forming rolls, the lower' of the two rolls being shown in section; and Fig- 2 is a section taken on line 22 of Fig. 1.

Like characters of reference indicate like parts in the several figures of the drawings.

Referringto the drawings, A represents the soft iron body part of the lower roll, which roll will be first described. The roll is formedwith the preferably integral boss B having the groove B; with the shaft 0 having the threaded part D; and with the journal forming portions E, E. Preferably the roll has the cent-rally enlarged bore F for the introduction of water for cooling purposes.

The hard or high carbon steel collar G is formed preferably with the tapered internal surface G. The least internal diameter of the collar is greater than the diameter of the shaft portion C of the soft iron body part. The outer or rolling surface of the collar may be formed with any desired pattern, such as that shown at G The collar abuts at one side against the boss B and on 'theother side an annular member H is provided which can be forced against the collar by me'ans'of the nut J, preferably provided with the grooves J for a spanner.

Interposed between the collar G and the shaft C is a wedge member which is shown as consisting of a split ring K having a tapered outer surface, the split in the ring being shown at K; Screws L are threaded through the boss B and engage the split ring K, these screws having the lock nuts L. By this means the split ring may be driven between the collar and the shaft C with any amount of force necessary to obtain a secure engagement between the collar and the body of the roll. If there is no looseness between these parts, there will be no opportunity for' wear, but if it should happen that the parts should become loose and the engaging surfaces worn down, the collar may be tightened up on the roll by further adjustment of the screws L.

The upper roll M may be in all respects the same in construction as the lower roll A just described, except that the integral boss N is provided with a rib N instead of a groove, this rib fitting into the groove B of the lower roll; the purpose of this being to prevent any endwise movement between the rolls; also the annular member H is v of smaller diameter than the member H,

and, in the particular arrangement shown, the hard steel collar 0 on the upper roll has its rolling surface provided wlth a different pattern formed, namely, by the notches or grooves D. In a composite roll of this character the strains as between the collar and the spindle or shaft of the roll are great, and as a result any looseness between these parts is likely to be injurious to or destructive of the soft iron or steel shaft or spindle. By driving the wedge between the collar and the shaft on which it is mounted, the collar is given a firm bearing on the shaft, which can be tightened when necessary, so that the strains exerted on the rolling surface of the collar are transmitted directly to the shaft on radial lines. Preferably, the wedge has a very slight taper and is practically the width of the collar, as shown, the wedge being just enough narrower than the collar to give room for driving it, if necessary. It will be seen that a closed pass is formed in the lower roll by means of the boss B and annular clamping member H, the collar O on the upper roll forminga tongue which extends into the groove so formed in the lower roll. lhis feature of the invention is'not claimed herein as it is claimed in my co-pending application above referred to. Obviously, 1f desired, one or other of the rolls might be an iron or soft steel roll of the old type, or might be of any other construction. That is, it is not essential that. both rolls should be of identical construction.

As modifications in shape, form and construction of the parts will readily suggest themselves to those familiar with this art,

I do not limit myself to the details of form and construction shown and described except so far as the scope of any of the claims demands.

I claim:

1. A metal working roll comprising a body part of relatively soft iron or steel, a member of high carbon steel provided with a metal forming surface, and a wedge which is interposed between the high carbon steel member and the iron or steel body part, so as to transmit the strains exerted against said metal formin surface directly to the portion of the body part inwardly thereof.

2. A metal working roll comprising a body part, a collar provided with a metal forming surface, and a wedge which is interposed between the'inner face ofthe collar and the body part so as to transmit the strains exerted against said metal forming surface directly to the portion of the body part inwardly thereof. v I

3. A metal working roll comprising a body part, a collar, and a wedge ring interposed between the inner face of the collar and the body part so as to transmit. the strains exerted against said metal forming surface directly to the portion of the body part inwardly thereof.

4. A metal working roll comprising a body part, a collar havin its inner surface tapered from one side of the collar to the other and provided with a metal forming outer surface; and a wedge ring substantially the width of said collar interposed between the collar and the body, for the purpose described.

5. A metal working roll comprising a body part, a collar provided with a metal forming outer surface, and a split wedge ring interposed between the inner face of the collar and the body part so as to-transmit the strains exerted against said metal forming surface directly to the portion of the body part inwardly thereof.

6. A metal working roll comprising a body part, formed with a shaft, a 'eollar provided with a metal'forming outer surface arranged on said shaft, means on said body part abutting against the collar on each side, and a wedge ring interposed between the shaft and the collar, for the urpose described.

7. A metal working roll comprising a body part formed with a shaft and with an integral boss, a collar surrounding said shaft and abutting against said boss, a wedge ring lll) interposed between said collar and said shaft, and removable means on the other side of the collar from the boss which bears against the collar for securing the collar on the shaft.

8. A metal working roll comprisinga body part formed with a shaft and with an integralboss, a collar surrounding said shaft and abutting against said boss, a wedge ring interposed between said collar and said shaft, and removable means on the other side of the collar from the boss which bears against the collar for securing the collar on the shaft, comprising an annular member and a nut.

9. A metal working roll comprising a body part formed with a shaft, a collar provided with a metal forming outer surface arranged on said shaft, clamping members which bear against the collar on each side thereof, and

a wedge ring between said clamping members and interposed between the shaft and the collar.

10. A metal working roll'comprising a body part formed with ashaft, a collar provided with a metal forming outer surface arranged on said shaft, clamping members which bear against the collar on each side thereof, a wedge ring between said clamping members and interposed between the shaft and the collar, and means for moving said wedge lengthwise of the shaft so as to tighten the engagement between the collar and the shaft. 7

11. A, metal working roll comprising a body part formed with a shaft, a collar provided with a metal forming outer surface arranged on said shaft, clamping members which engage the collar on each side thereof, a wedge ring between said clamping members and interposed between the shaft and the collar, and screws extending through &

one of said clamping members which bear against said wedge ring whereby said ring may be moved lengthwise of the shaft to tighten the engagement between the collar and said shaft. 1

12. A met-a1 working roll comprising a body part formed with a shaft and, with an integral boss, a collar surrounding said shaft and abutting against said boss, a wedge ring interposed between the collar and the shaft, a clamping member on the other side of the collar from the boss, and means other than said clamping member whereby said wedge ring may be moved lengthwise of the shaft so as to tighten the engagement between the collar and said shaft.

13. A metal working roll comprising a body part formed with a shaft and with an integral boss, a collar surrounding said shaft and abut'ting'against said boss, a wedge ring ring which is interposed in the annular space between said annular member and said shaft, said .wedge and annular member having a very slight taper so that the strains exerted against the annular member are transmitted directly to said shaft.

, DAVID H; LENTZ. \Vitnesses G. Y." SKINNER, 11. L. PECK. 

